/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the License).  You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * Header Notice in each file and include the License file 
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
 * If applicable, add the following below the CDDL Header, 
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information: 
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 */

/* CVS information
 * $Header: /cvs/glassfish/jmx-remote/rjmx-impl/src/java/com/sun/enterprise/admin/jmx/remote/comm/ServletConnection.java,v 1.5 2006/12/22 22:31:30 km105526 Exp $
 * $Revision: 1.5 $
 * $Date: 2006/12/22 22:31:30 $
*/

package com.sun.enterprise.admin.jmx.remote.comm;

//jdk imports
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.net.URLConnection;
import java.net.HttpURLConnection;
import java.net.URL;
/* BEGIN -- S1WS_MOD */
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Logger;
/* END -- S1WS_MOD */

import com.sun.enterprise.admin.jmx.remote.DefaultConfiguration;
/* BEGIN -- S1WS_MOD */
import com.sun.enterprise.admin.jmx.remote.streams.*;
/* END -- S1WS_MOD */

/** A packager private Class (implementing {@link IConnection} communicating 
 * with Servlet over HTTP. Internally it uses java.net.URLConnection,
 * for we may need to use it for both HTTP and HTTPS. In case of
 * java.net.HttpURLConnection, only HTTP can be used. The server side (servlet etc)
 * has to be configured as documented, for this connection to work.
 * @author Kedar Mhaswade
 * @since S1AS8.0
 * @version 1.0
 */

class ServletConnection implements IConnection, Runnable {
	static final String         UNKNOWN_HOST            = "Unknown host : ";
	static final String         UNAUTHORIZED_ACCESS     =
	"Invalid user or password";
	
	private URLConnection        mConnection           = null;
	private ObjectOutputStream   mObjectOutStream      = null;
	private ObjectInputStream    mObjectInStream       = null;
        private HttpConnectorAddress hca;
	
/* BEGIN -- S1WS_MOD */
    private static final Logger logger = Logger.getLogger(
        DefaultConfiguration.JMXCONNECTOR_LOGGER);/*, 
        DefaultConfiguration.LOGGER_RESOURCE_BUNDLE_NAME );*/

    private boolean response_received =false;
    private int streamSize = 0;
    private int reqSize = 0;
/* END -- S1WS_MOD */

	ServletConnection(HttpConnectorAddress a) throws IOException {
		try{
/* BEGIN -- S1WS_MOD */
            //mConnection = a.openConnection(DefaultConfiguration.DEFAULT_SERVLET_CONTEXT_ROOT);
            String uri = a.getPath();
            if (uri == null || uri.trim().length() == 0)
                uri = DefaultConfiguration.DEFAULT_SERVLET_CONTEXT_ROOT;
			mConnection = a.openConnection(uri);
/* END -- S1WS_MOD */
                    this.hca = a;
		}
		catch (IOException ioe){
			handleException(ioe);
		}
	}
	
	
	/**
	 Read an incoming Object.
	 */
	public  Object receive(  ) throws IOException, ClassNotFoundException {
		Object value = null;
		try {
            InputStream in = mConnection.getInputStream();
			mObjectInStream = new ObjectInputStream(in);
			value = mObjectInStream.readObject();
            response_received = true;
            JMXInbandStream.setOutputStream(null, 0);
            StreamMBeanServerResponseMessage res = 
                (StreamMBeanServerResponseMessage) value;
            if (res.isStreamAvailable()) {
                JMXInbandStream.setIncomingStream(
                    new JMXChunkedInputStream(in));
            }
		}
		catch (IOException ioe) {
			handleException(ioe);
		}
		return value;
	}
	
	/**
	 Write an object to the connection
	 */
	public  void	send(Serializable req)
            throws IOException {
        InputStream in = null;
        if (req instanceof StreamMBeanServerRequestMessage) {
            StreamMBeanServerRequestMessage reqm =
                    (StreamMBeanServerRequestMessage) req;
            JMXInbandStream.setIncomingStream(null);
            in = JMXInbandStream.getOutgoingStream();
            if (in != null) {
                reqm.setStreamAvailable(true);
                int len = (int) JMXInbandStream.getOutgoingStreamLength();

                ByteArrayOutputStream byO = new ByteArrayOutputStream();
                ObjectOutputStream oO = new ObjectOutputStream(byO);
                oO.writeObject(reqm);
                reqSize = byO.size();
                byO.reset();

                int chunks = (len/8192) + 2;
                streamSize = reqSize + len + (chunks * 4);
                ((HttpURLConnection)mConnection).setFixedLengthStreamingMode(streamSize);
                mConnection.setRequestProperty("Connection", "Close");
            }
        }
        sendReq(req);
        if (in != null)
            sendStream();
    }

    private void sendStream() {
/*        Thread thr = new Thread(this);
        thr.start();
*/
        run();
    }

    public void run() {
        OutputStream out = null;
        try {
            out = new JMXChunkedOutputStream(mConnection.getOutputStream());
            InputStream in   = JMXInbandStream.getOutgoingStream();
            byte[] bytes = new byte[8192];
            int len = 0;
            int prLen = 0;
            int flBytes = 0;
            while ((len = in.read(bytes)) != -1) {
                out.write(bytes, 0, len);
            }
            JMXInbandStream.setOutputStream(null, 0);
            out.flush();
            ((JMXChunkedOutputStream)out).writeEOF(reqSize);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

	private  void	sendReq( Serializable object ) throws IOException {
        response_received = false;
		try {
			mObjectOutStream = new ObjectOutputStream(
			new BufferedOutputStream(mConnection.getOutputStream()));
			mObjectOutStream.writeObject(object);
			mObjectOutStream.flush();
			//mObjectOutStream.close();
		}
		catch (IOException ioe) {
			handleException(ioe);
		}
	}
	
	public void	close() {
		try {
			mObjectInStream.close();
			mObjectOutStream.close();
		}
		catch(Exception e) {
			throw new RuntimeException (e);
		}
	}
	
	
	private void handleException(IOException e) throws IOException {
		IOException exception = null;
		if (e instanceof java.net.UnknownHostException) {
			exception = new java.net.UnknownHostException(UNKNOWN_HOST +
			e.getMessage());
		}
		else if (e instanceof java.net.ConnectException) {
			exception = new java.net.ConnectException(createConnectExceptionMessage());
		}
		else {
			int responseCode =
			((HttpURLConnection)mConnection).getResponseCode();
			if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
				exception = new IOException(UNAUTHORIZED_ACCESS);
			}
			else {
				exception = e;
			}
		}
		throw exception;
	}
        
        private String createConnectExceptionMessage() {
            /* this is not internationalized yet -- this is because there is a 
               separate delivery of this code that cannot depend on other parts 
               of application server
            */
            final String h = hca.getHost();
            final int    p = hca.getPort();
            final String msg = "Unable to connect to admin-server at given host: [" + h + "] and port: [" + p + "].\nPlease check if this server is up and running and that the host and port provided are correct.";
            return ( msg );
        }
}
